Abstract: Industrial furnaces emit a large number of pollutants into the atmosphere every year. This research applied low polluting natural gas-fired catalytic furnace to reduce air pollution in the process of heating tri-color glazed pottery of Tang Dynasty. The temperature and distribution of pollutants of exhaust gas were investigated inside the furnace without pottery. The natural gas-fired catalytic furnace met temperature requirements of making tri-color glazed pottery and had lower pollution. The temperature inside furnace was controlled by adjusting the extent of door opening and changing input power. Meanwhile,the concentration of each pollutant in the exhaust gas was measured during the heating process. The optimum heating process was obtained by theoretic analysis and numerous experiments. The results showed that the glaze bonded closely in the natural gas-fired catalytic furnace,with well immersed colors smooth feel,and uniform opening pieces. In addition,the heating process in the natural gas-fired catalytic furnace had lower pollutant emissions,making this method a substitute to the traditional furnaces with high pollutions.

Key words: natural gas, catalytic combustion, radiation, characteristics of Furnace, tri-colored glazed pottery of Tang Dynasty

摘要： 目前各种工业炉窑在生产过程中,都伴随有大量污染物的排放.鉴于这一问题,本文提出将低污染的天然气催化燃烧和炉窑相结合工艺流程.首先研究了天然气催化燃烧炉窑空烧时的炉膛温度分布情况和燃烧产生的烟气的污染物特性.结合唐三彩传统烧制工艺,得出天然气催化燃烧炉窑满足烧制唐三彩的温度要求,而且具有低污染物浓度的特性.然后,通过调节炉门的打开程度及改变炉窑的输入功率对炉膛温度进行控制,并测量烧制过程中烟气的各污染物含量,理论分析和多次实验相结合拟定烧制唐三彩的最佳工艺流程.研究结果表明,使用天然气催化燃烧炉窑及本工艺流程烧制的唐三彩胎釉紧密,色彩有不同程度的浸漫和流淌,手感十分光滑,开片均匀,烧制效果非常好,可与传统工艺相媲美,具有很高的艺术价值,同时烧制过程是低污染排放,是以后替代传统高污染工业炉窑发展的一种方法.

关键词: 天然气, 催化燃烧, 辐射, 炉窑特性, 唐三彩